The dark, fire-cracked material is what remains of a fulacht fia, a type of prehistoric cooking or heating site found in enormous numbers across Ireland, typically beside water. The basic method involved heating stones in a fire, dropping them into a water-filled trough, and bringing the water to a boil. The stones shatter and blacken with repeated heating, and it is these characteristic spreads of burnt and broken stone that survive, sometimes as low mounds, sometimes as little more than a dark stain in the ground.

The site sits on the northern side of a stream, a location entirely typical of fulachta fiadh, which almost invariably appear close to a reliable water source. What makes this particular spot worth noting is that it does not stand alone. A 1943 Ordnance Survey six-inch map records two such sites in this immediate area, and both appear to have been known to cartographers working in mid-twentieth century Cork, even if they received little wider attention. The burnt material still visible around the tree roots suggests the archaeology survives in some form beneath the plantation floor, compressed and interrupted by forestry activity but not entirely erased.